Boring-machine.



F. SELBERNAGEL.

BORING MACHINE.

APPLICATION HLED APR. 15. 1918.

Patented Apr. 15, 1919.

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F. SILBERNAGEL. BORING MACHINE.

APPLICATION FILED APR. I5, I918.

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Patented A 15,

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F. SILBERNAGEL.

BoRlNG MACHINE. APPLICATION FILED APRJI5'. 1916.,

{SHEETS-SHEET 4f Patented Apr. 15,1919.

UNITED STATES PATENT enrich.

SILBERNAGER OF OAK PARK, ILLINOIS, ASSIGNOR OF ONE-THIRD 'I'O EDWIN T. ERICKSON, 01? OAK PARK, ILLINOIS, AND ONE-THIRD TO WILLIAM A. HANSEN, OF

CHICAGO, ILLINOIS.

BORING-MACHINE.

essences.

Specification of Letters Patent.

Patented Apr. 15, 1919.

Application filed April 15, 1918. Serial No. 228,644.

To all whom it may concern:

Be it knownthat I, FRED SILBERNAGEL, a citizen of the United States, and a resident of Oak Park, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Boring-Machines, of which the following is a full, clear, and exact description.

The invention relates to boring and mortising machines having a number of tools and is more particularly designed for forming mortises in the stiles and bars of window sashes and the .like. The improvement seeks to, provide a multiple tool boring machine having means for quickly and simultaneously adjusting the boring tools to variably space the same, and the invention consists in the features of improvement hereinafter set forth, illustrated in the preferred form in the accompanying drawings and more particularly pointed out in the appended clalms. e

In the drawings, Figure 1 is a front elevation of the improved machine. Fig. 2 is a view partially in plan and partially in section on the lines 22 of Figs. 1 and 3. Fig. 3 is a vertical cross section of the improved machine. Figs. 4c, 5 and 6 are detail vertical sections showing the adjusting mechanisms for the difi'erent tools. Figs. 7 and 8 are opposite end elevations with the pulleys and belts at the endsof the machine shown in dotted lines.

The improved machine has a substantially rectangular cast metal frame 10 and a series of laterally adjustable supports or carriages 11. The upper portion of the'frame is provided at the front and rear thereof with dovetail guides or ways 12 which engage correspondingly sha ed seats formed in the lower faces of pro] ecting front and rear end portions of the supports or carriages. Each support or carriage 11 has mounted thereon a longitudinally movable slide 13 having a dovetail rib 14 on its lower face that engages a correspondingly shaped guide groove in the upper face of thesupport or carriage. A rotary boring spindle 15 is journaled in suitable bearings 16 on the slide 13 and carries a bit 17 at its outer end. The latter in the form shown is arranged within a hollow chisel 18 which is fixed to a support or holder 19 therefor at the forward end of the tool carrying slide. i

. Each support or carriage is provided wlth drive meohanism for rotating the corresponding borlng tool and with feed mechanlsm for effecting the longitudinal movement thereof. Preferably, as shown, each boring spindle 15 is provided at its rear end with a wide spur pinion 20 which meshes wlth a pinion 21 on the forward end of a short shaft 22 journaled in a bearing 23 on the rear end of the carriage, the pinion 20 being of sufiicient width to maintain its engagement with the pinion 21 during the longitudinal feeding movement of the slide 13 and boring spindle 15. Each short countershaft 22 is provided on its rear end with a beveled pinion 24 which meshes with a beveled gear 25 on a drive shaft 26. The latter is ournaled at its ends in bearings 27 formed upon the upper portions of brackets 28 (see Figs. 7 and 8) which project upwardly and rearwardly from the upper rear portion of the main frame. The bevel gears 25 are splined to the shaft 26 to rotate therewith but are connected to and arelaterally adj ustable with the supports or carriages 11. For this purpose, each of the latter is provided with a rearwardly projectin bracket 29 having a semi-circular or for lied rear end which engages the grooved hub of the cor-' responding bevel gear 25.

One end of the drive shaft 26 is provided with a pulley 30 (see Figs. 1 and 8) which is connected by a belt 31 with a pulley 32 on a main operating shaft 33. The latter is arranged in the lower rear portion of the main frame and is journaled at its ends in suitable bearings 34 being provided with a drive pulley 35 or other means by which it can be driven from a suitable source of power. The drive mechanism described serves to rotate the boring tools in the different adjusted positions of the supports or carriages 11.

The feed mechanism for longitudinally reciprocating each slide 13 and the boring tools thereon comprises an oscillatin lever 36 pivotally mounted between its en s in a recess 37 in the upper portion of the corresponding support or carriage 11. The upper end of this lever extends into a recess in the side of the corresponding slide 13 and be tween fixed and movable members 38 and 39. The member 39 is mounted on a pivot pin 40 and in normal position engages a stop pin 41 and also engages the upper end of the feed lever 36 so that, as the latter is oscil lated, it serves to reciprocate the slide 13 and the boring tool thereon. By shifting the member 39 to the position shown in dotted lines in' Fig. 3, the slide 13 may be disconnected from the feed lever.

Each support or carriage 11 is provided with an integral portion 42 which extends downwardly between the front and rear side portions of the main frame and is hollowed out to receive the operating gears for the feed mechanism and also the gears of the preferred form of mechanism employed for adjusting the supports. Each of the depending portions 42 is provided with a suitable cover plate 43 held in place by bolts 44 (see Figs. 1, 2 and 3). A horizontal feed shaft 45 extends through each of the supports or carriages 11 and is journaled at its ends in bearings 46 on the ends of the main frame. Spur gears 47 splined to this shaft are arranged within the portions 42 of each support or carriage and mesh with drive gears 48 that are mounted on studs 49 fixed to the carriage portions 42 as shown. Each of these gears has a crank pin 50 which en gages a longitudinal slot 51 in the lower end of the corresponding feed lever 36. The forward or working movement of the work'- ing tool is effected at relatively slow speed while the pin 50 passes through the upper portion of the slot 51, while the return movement is accomplished at relatively high speed as the pin passes through the lower portion of the slot.

The feed shaft 45' (see Figs. 2 and 7) is provided at its left hand end with a spur gear 52 which meshes with a pinion 53 on a short countershaft 54 j ournaled in a hearing 55 on the left-hand end of the machine frame. A large pulley 56 on this shaft is connected by a belt 57 to a relatively small. pulley 58 in the left-hand end of the main drive shaft 33. Suitable means are provided for throwing the feed shaft into and outv of operation. For this purpose, in the form shown, a tightener pulley 59 for the belt 57 is mounted upon the end of a lever 60, the latter being pivoted to a bracket 61 on the adjacent end of the main frame. A link 62 connects the lever 60 to an arm 63 on a shaft 64. The latter is j ournaled on the lower portion of the machine frame and is provlded with a series of forwardly projecting arms 65 having a foot piece 66 thereon which may be depressed and released, as required by the operator, to throw the feed mechanism for the boring tools into and out of operation.

Means are provided for simultaneously and variably adjusting the transversely movable supports to thereby variably space the boring tools, the adjusting mechanism being arranged to maintain the spacing of the tools equal or uniform in each different adjustment. The adjustment of each support or carriage is effected by threaded members preferably in the form of sleeves or nuts 67 mounted upon a pair of horizontal stationary screws 68. The latter extend through the supports or carriages at the upper front and rear portions thereof and are fixed at their ends to the end portions of the main frame.

The threaded adjusting sleeves or nuts 67 are rotated by gearin from an adjusting shaft 69 which extends through the lower central portions of the carriage parts 42 and is journaled at its ends in bearings 70, the

latter being mounted upon the end portions of the main frame. A pulley 71 on the righthand end of the adjusting shaft is connected by a belt 72 to a pulley 73 on a horizontal countershaft 74. The latter is arranged at the lower front portion of the main frame and is journaled in bearings 75 mounted on the ends of the frame.

' Two loose pulleys 76 on the shaft 74 are connected by straight and crossed belts 77 and 78 to a pair of pulleys 79 on the main driveshaft 33. A double cone clutch member 80 keyed to the shaft 74 eoeperates with friction clutch members 81 on the pulleys 76 to connect either one of the pulleys to the shaft and thereby rotate it and the adjusting shaft 69 in opposite directions. An op erating lever 82 for the clutch member 80 is pivoted on a stud 83 on the inner face of the front portion of the main frame and has an offset upper end which extends outwardly through an opening in the front of the frame and constitutes a handle whereby the operator can throw the adjusting mechanism into and out of operation. Adog 84 on the operating lever is connected by a link 85 to a trip 86. This dog is arranged to cooperate with a notched lug- 87 to hold the lever and clutch member 80 in idle central position. By shifting the lever in one or the other direction, the adjusting mechanism may be thrown into operation to rotate the threaded sleeves or nuts 67 and thereby adjust, the slides or carriages to separate the boring tools or move them together.

' Means are preferably provided for automatically throwing the adjustingmechanisni out of operation when the right-hand boring tool reaches the end of its movement in one or the other direction. In the construction shown, there are four boring tools, although more or less may be provided as required. The right-hand slide or carriage is provided at its forward end with a depending lug 88 which is arranged to engage lugs 89 on a bar 90. The latter slides horizontally in two supporting guides 91 on the upper front portion of the machine frame and its central portion is pivotally connected to the upper end of a lever 92. The latter is pivoted between its ends to the front of the main frame and has a lower T-shaped end provided with forsition to rotatetheadjusting shaft and move the tool supports toward the right-hand end of the machine. At the end of this move ment, the lug 88 will engage the right-hand collar 89 and through the medium of thebar- 90 and-lever 92 will shift the clutch lever 82 and thereby disengage the clutchmember 80 and arrest the operation of the adjusting mechanism.

The connections between shaft 69'and the threaded members or nuts 67 have di fierent speed ratios 86 that the different supports and toolsthereon are variably adjusted, but the speed ratios are such that in each difierent adjustment the dis-' tances between the boring tools will be uniform. a

In the preferred form shown, each threaded member or sleeve 67 is provided with integral sprocket teeth connected by a chain 95 to sprocket teeth formed upon the hub of a gear96. The gears 96 are mounted on stud shafts 97 fixed to the lower depending portions 42 of the slides or carriages and each pair of gears 96 mesh with a drive gear 98 on the adjusting shaft 69. j The gears 98 are connected to shift with the slides or carriag es but are splined to the adjusting shaft 69 to rotatetherewith. V

- The gears 96 and 98 of the different supports or carriages are of different sizes and have different speed ratios. Thus, in the construction shown, which has four tools, the support or carriage at the extreme left of the machine has adrive gear 98 which is half the size of the driven gears 96 '(seeFig. 3) in the next adjacent carriage, the gears 98 and 9 6, as shown in Fig, 4, are of the same size; and the ratios between these gearsiin th third and fourth carriages are,'respective ly, 3 to 2 and 2to 1, asshown in Figs. 5 and 6. The mechanism described thus serves when thrown into operation to move the tools either together or apart and also serves to' maintain the spacing between the tools uniform in each different adjustment. The adj ustment can be readily and quickly effected to space the tools as desired] and the driving andfeedingmechanisms for each tool movewith the corresponding support and operate properly in each different adjustment." 5 i Each support is preferably provided with a work support inthe form of a Ufshaped member 99 havingdownturned legs 100'at their inner ends which extend through open ings in'the front end of the corresponding slide and are secured thereto in'adjustedposition by's'et screws 10 1. Each work support is provided with horizontally adjustable stops 102 and 103' held in placeby' clamp the adj usting screws-104 and 105,and by} means of which the work can be accurately positioned in front of the tool. At the left-hand'end of the main frame a workgage or stop is prov1d ed. This comprises an angle piece 106 adjustably mounted on the forwardly projecting' end of an anglebolt 107, being.

clamped in position thereon by a set screw 108. The vertical portion of the bolt 107 extendsthrough a lug 109 on the frame and is held in position by a set screw 110. The vertical and horizontal portions of the gage are provided. with stops 111 which engage the end of a piece ofwork. The gage 106 and the stops 102 and103 on the work supports 99 can be set to quickly and accurately position the pieces of work. Moreover, shavlngs cannot readily accumulate on the open'U-sha-ped work supports." The front ends of the supports are also preferably provided with recesses 112 through which shavings can fall. Pointers113 in these recesses coiiperate with a scale 114 on the.

front of the machine frame and assist the adjustment of the supports and tools.

Obviously, changes may be made in the construction set forth'without departure from the essentialsof the invention as defined in the claims. I

with a frame,of a series of laterally adjustablesupports on said frame, a rotatable, longitudinally movable boring spindle and spindle feed and drivemechanisln s carried by each of said supports, mechanism adapted'to simultaneously and variably adjust .saidsupports and spindles to and from" one another andto maintain the spacing thereof uniform in each difierent adjustment, and means 'for' actuating said spindle feed and drive mechanisms in the different adjusted positions of said supports. i

3. In a boring machine, the combination with a frame, of a series of later ally adjust: able supports on said frame, a rotatable; longitudinally movable boring spindle and spindle feed and drive mechanisms carried by each of said supports, common actuating shafts for the feed and; drive mechanisms respectively of the different spindles, said mechanisms having gears slidable on said shafts as said supports'are adjusted, and mechal'iislnfor simultaneously adjusting said supports to variaibly space said spindles.

4. InI a boring machine, the combination with. a, frame, of a series of laterally adijustable supports on said frame, a rotatable, longitudinallymovable boring spindle and spindle feed and drive mechanisms carried by each of said supports, mechanism, for simultaneously adjusting said supports to variably space said spindles, a main operating shaft, controllable connections. between said shaft and said adjusting mechanism, and. means actuated by said shaft for operating said spindle. feed and drive; mechanisms in the difiierent adjusted positions of said, supports.

5. Ina boring machine, the combination with a. frame, of a series of laterally adjust- .able supportsfthereon, boring spindles on said supports, clutch controlled, power-oper ated mechanism for simultaneously adjusting said supports tovariably space said spindles, and means for rotating said spindlesi in the. different. adjusted positions of said supports.

6. In a. boring machine, the combination with a frame, of a series of laterally adjustable supportsthereon,boring spindles on said supports, reversible, power-operated mechanism adapted to simultaneously and variably adjust said supports and spindles in opposite directions and to maintain the spacing thereof uniform in each different adjustment, and means for rotating said spindles in theqdiiferent adjusted positions of said supports.

= In a boring. machine, the combination with a frame, of a series. of laterally adjustable supports] thereon, boring spindles on said supports, reversible, power-operated mechanism for simultaneously adjusting said supports in opposite directions to'variably space said spindles, means for automatically throwing said mechanism out of operation at the end of its movement in either direction, and means for rotating said spindles in the different adjusted positions.

of said supports.

8; In a boring machine, the combination with a frame, of a series of laterally adjustable supports on saidfraine, aboring spindie. and drive mechanism therefor connected to and adjustable with each of said supports, a common actuating shaft, each of said drive mechanisms having a gear slidably engaging said shaft, mechanism adapted to simultaneously and variably adjust said supports and spindles in opposite directions and to maintain the spacing thereof uniform in each difi'erenta'djustm'ent, a'main shaft connected to said actuating shaft, and reversible, clutch. controlled connections betweensaidmain shaft and said adjusting mechanism i 9. In a boring machine,-thecombinationwith a frame, of a Series of laterally adjustable supports on said frame, rotatable,

nsomoca longitudinally movable boring spindles on said supports, spindle feed and drive mechanism and an adjustable work support connected to and adjustable with each of said supports, means foroperating said feed and drive mechanisms in each of the different adjusted positions of said supports, and means for adjusting said supports'to variably space said spinddes.

10. In a boring machine, the combination with a frame, of a series of laterally adjustable supports, a boring spindlev and a drive mechanism therefor carried byeach of said supports}, a common actuating shaft for said drive mechanisms, a work gage at one end of said frame, and means adapted to. simultaneously and variably adjust all of said supports and spindles to and from said gage and to maintain the. spacing thereof uniform in each different adjustment.

11. In a boring machine, the combination with a. frame, of a series of laterally adjustable supports on said frame, boringspindles, on said supports, means for driving said spindles in the different positions of said supports, and adjusting mechanism for said supports comprisinga pair of screws mounted in said frame and connected to the opposite ends of said supports, and clutch controlled, reversible actuating means forsaid adjusting mechanism. I

12. In a boring'machine, the combination with a frame, of a series of laterally adjust.- able supports on said frame, boring spindles on said supports, means for driving said spindles in the different positions of said supports, threaded members for adjusting said supports, an operating shaft, and separate sets of gears between said shaft and said adjusting members.

13. In a boring machine, the combination with a frame, of a series of laterally adjustable supports on said frame, boring spindles on said supports, means for driving said spindles inthe different positions of said supports, screw mechanism having separate threaded. members for adjusting said supports, a shaft, and operating connections between said shaft and said threaded members having different speed ratios and arranged to maintain said supports uniformly spaced in each different adjustment. 7

14:. In a boring machine, the combination with a frame, ofa series of laterally adjustable'supports on said frame,boring spindles on said supports, means for driving said spindles in the different, positions of said supports, separate threaded members engaging said supports, an adjusting shaft, separate sets of gears havingv different speed ratiosinterposed between said shaft and said threaded members, and means for throwing said shaft into and out of operation.

15. In a boring machinathe combination with a frame, of a'series of laterally adjuston said supports, means able supports on said frame, boring spindles on said supports, means for driving said spindles in the different positions of said supports, separate threaded members engaging said supports, an adjusting shaft, separate sets of gears for operating said members carried by said supports, one of the gears of each set being splined to and slidable on said shaft, and reversible clutch-controlled means for operating said shaft.

16. In a boring IIliLClli116,*tl'1B combination with a frame, of a series of laterally adjustable supports on said frame, boring spindles for driving said spindles in the difierent positions of said supports, a screw, threaded sleeves mounted on said supports and engaging said screw, sets of gears for rotating said sleeves carried on said supports and having different speed ratios, and an adjusting shaft engaging one of the gears of each set.

17 In a boring machine, the combination with a frame, of a series of laterally adjust- Gopies of this patent may be obtained for able supports on said frame, boring spindles on said supports, means for driving said spindles in the different positions of said supports, an adjusting shaft, connections having different speed ratios interposed between said shaft and said supports adapted to maintain the latter uniformly spaced in each different adjustment, and reversible, clutch-controlled drive mechanism for said shaft.

18. In a boring machine, the combination with a frame, of a series of laterally adjustable supports, a longitudinally movable, rotating driving spindle on each of said supports, support adjusting mechanism and spindle feed and drive mechanisms on each of said supports, feeding, driving and .adjusting shafts for respec ively operating said mechanisms, the latter having gears slidable op. si faid shafts, and means for operating said s a ts.

FRED SILBERNAGEL.

five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

